keyboard.c

c51的温度测量程序,利用的是模拟输入初学哦

/*
 * File: Keyboard.c
 *
 * Detail: 键盘处理API
 *
 * Created by Pandar([e-mail]) on 2009-2-22
 *
 * Modified by Pandar([e-mail]) on 2009-2-22
 *
 */

 #include "ChunfengStdX51.h"
 #include "Keyboard.h"


uint8 xdata Keyboard _at_ KEYBOARD_ADDRESS;

uint8 GetKeyNumber()
{
    uint8 value=Keyboard;
	value&=0x1F;
	switch(value)
	{
	  case 0x1E:
	      return 1;
	  case 0x1D:
	      return 2;
	  case 0x1B:
		  return 3;
	  case 0x17:
		  return 4;
	  case 0x0F:
		  return 5;
	  default:
	      return 0;
	}

}